A kind of cultivation method of nitrosative dominant bacterial group
A technology of dominant flora and cultivation methods, applied in biochemical equipment and methods, using compounds to stimulate growth, microorganisms, etc., can solve the problems of difficult and stable control of DO concentration, ineffective control, long time, etc., to achieve long-term Stabilizing nitrosation ability, shortening culture time, and the effect of strong bacterial tolerance
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Embodiment 1
[0032] The first stage: the enrichment of nitrifying bacteria, the initial concentration of ammonia nitrogen in the culture medium is 150mg / L, during the enrichment process, use NaHCO 3 The solution adjusts the pH. Culture conditions: temperature is 24°C, pH is 6.0-7.5, SV30 is 15%-20%, DO is 4mg / L. One cycle per day, the water intake time is 20 minutes, the aeration is 23 hours, the natural settlement is 30 minutes, and the supernatant is removed. Then add the enriched culture solution with the same volume as the supernatant. Every time the culture solution is replaced, the microbial growth promoter A-I must be added according to the concentration of the promoter in the sewage at 20 mg / L. According to this process, the distillation process of GB7479 is used. The concentration of ammonia nitrogen in the water was detected by titration. After no ammonia nitrogen was detected, the concentration of ammonia nitrogen in the pre-added culture solution was increased by 100 mg / L. Aft...
Embodiment 2
[0036] The first stage: the enrichment of nitrifying bacteria, the initial concentration of ammonia nitrogen in the culture medium is 150mg / L, during the enrichment process, use NaHCO 3 The solution adjusts the pH. Culture conditions: temperature is 24°C; pH is 6.0-7.5; SV is 15%-20%; DO is 4mg / L. One cycle per day, the water intake time is 20 minutes, the aeration is 23 hours, the natural settlement is 30 minutes, and the supernatant is removed. Then add the enriched culture solution with the same volume as the supernatant. Every time the culture solution is replaced, the microbial growth promoter A-II must be added according to the concentration of the promoter in the sewage at 25mg / L. According to this process, the distillation method of GB7479 is used. The concentration of ammonia nitrogen in the water was detected by titration method. After no ammonia nitrogen was detected, the concentration of ammonia nitrogen in the pre-added culture solution was increased by 100 mg / L....
Embodiment 3
[0040] The first stage: the enrichment of nitrifying bacteria, the initial concentration of ammonia nitrogen in the culture medium is 150mg / L, during the enrichment process, use NaHCO 3 The solution adjusts the pH. Culture conditions: temperature is 24°C; pH is 6.0-7.5; SV is 15%-20%; DO is 4mg / L. One cycle per day, the water intake time is 20 minutes, the aeration is 23 hours, the natural settlement is 30 minutes, and the supernatant is removed. Then add the enriched culture solution with the same volume as the supernatant, and add the microbial growth promoter A-Ⅲ according to the concentration of the promoter in the sewage at 25 mg / L each time the culture solution is replaced, and operate in a cycle according to this process, using GB 7479 The concentration of ammonia nitrogen in the water was detected by distillation titration. After no ammonia nitrogen was detected, the concentration of ammonia nitrogen in the pre-added culture solution was increased by 100 mg / L. After 1...
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